sick of being harrassed

i have a Nedbank credit card outstanding debt which i arranged a monthly payment of R500 which i have been doing until I had a serious accident on 2 March 2024 which has left me cripple and had my legs amputated at Dr Pixley ka Isaka Seme Memorial Hospital. i have sent them communication from my surgeon and even mentioned that all this information can be verified. i have undergone 5 surgeries. This company is harrassing despite me telling them i cannot pay and causing me even more grief. How do i pay, I CANNOT work. is their a clause in my initial agreement with Nedbank that should i have an accident or is unable to work what would happen my balance Please STOP harrassing me with threatening emails saying that you will take movable assets